From: Lu Feifei lufeifei@wxiat.com
Sunway inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I56WV8
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When passing through device, 32-bit MEMIO address of guest os is between 3G and 3.5G, and it may produce dma address beyond 3.5G, which is considered to be MEMIO address of host and cause DMA to to fail. To fix it, 32-bit MEMEIO address of guest os should keep consistent with host.
Signed-off-by: Lu Feifei lufeifei@wxiat.com
Signed-off-by: Gu Zitao guzitao@wxiat.com --- arch/sw_64/chip/chip3/chip.c | 5 +---- arch/sw_64/chip/chip3/pci-quirks.c | 4 +--- arch/sw_64/include/asm/chip3_io.h | 1 - arch/sw_64/kernel/pci.c | 8 +++----- 4 files changed, 5 insertions(+), 13 deletions(-)
diff --git a/arch/sw_64/chip/chip3/chip.c b/arch/sw_64/chip/chip3/chip.c index bd20e262e609..2d8f3c81e1c6 100644 --- a/arch/sw_64/chip/chip3/chip.c +++ b/arch/sw_64/chip/chip3/chip.c @@ -538,10 +538,7 @@ static void chip3_hose_init(struct pci_controller *hose) hose->ep_config_space_base = PAGE_OFFSET | pci_io_base | PCI_EP_CFG; hose->rc_config_space_base = PAGE_OFFSET | pci_io_base | PCI_RC_CFG;
- if (is_in_host()) - hose->mem_space->start = pci_io_base + PCI_32BIT_MEMIO; - else - hose->mem_space->start = pci_io_base + PCI_32BIT_VT_MEMIO; + hose->mem_space->start = pci_io_base + PCI_32BIT_MEMIO; hose->mem_space->end = hose->mem_space->start + PCI_32BIT_MEMIO_SIZE - 1; hose->mem_space->name = "pci memory space"; hose->mem_space->flags = IORESOURCE_MEM; diff --git a/arch/sw_64/chip/chip3/pci-quirks.c b/arch/sw_64/chip/chip3/pci-quirks.c index 9043e56f9092..22887d269fe3 100644 --- a/arch/sw_64/chip/chip3/pci-quirks.c +++ b/arch/sw_64/chip/chip3/pci-quirks.c @@ -231,9 +231,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, enable_sw_dca); void __init reserve_mem_for_pci(void) { int ret; - unsigned long base; - - base = is_in_host() ? PCI_32BIT_MEMIO : PCI_32BIT_VT_MEMIO; + unsigned long base = PCI_32BIT_MEMIO;
ret = add_memmap_region(base, PCI_32BIT_MEMIO_SIZE, memmap_pci); if (ret) { diff --git a/arch/sw_64/include/asm/chip3_io.h b/arch/sw_64/include/asm/chip3_io.h index 1028842f7a81..0125b950da7c 100644 --- a/arch/sw_64/include/asm/chip3_io.h +++ b/arch/sw_64/include/asm/chip3_io.h @@ -19,7 +19,6 @@ #define PCI_LEGACY_IO (0x1UL << 32) #define PCI_LEGACY_IO_SIZE (0x100000000UL) #define PCI_MEM_UNPRE 0x0UL -#define PCI_32BIT_VT_MEMIO (0xc0000000UL) #define PCI_32BIT_MEMIO (0xe0000000UL) #define PCI_32BIT_MEMIO_SIZE (0x20000000UL) #define PCI_64BIT_MEMIO (0x1UL << 39) diff --git a/arch/sw_64/kernel/pci.c b/arch/sw_64/kernel/pci.c index 75d2e645bf2c..81393484ed51 100644 --- a/arch/sw_64/kernel/pci.c +++ b/arch/sw_64/kernel/pci.c @@ -233,13 +233,11 @@ void __init common_init_pci(void) hose->busn_space->start = last_bus; init_busnr = (0xff << 16) + ((last_bus + 1) << 8) + (last_bus); write_rc_conf(hose->node, hose->index, RC_PRIMARY_BUS, init_busnr); - if (is_in_host()) { - offset = hose->mem_space->start - PCI_32BIT_MEMIO; + offset = hose->mem_space->start - PCI_32BIT_MEMIO; + if (is_in_host()) hose->first_busno = last_bus + 1; - } else { - offset = hose->mem_space->start - PCI_32BIT_VT_MEMIO; + else hose->first_busno = last_bus; - } pci_add_resource_offset(&bridge->windows, hose->mem_space, offset); pci_add_resource_offset(&bridge->windows, hose->io_space, hose->io_space->start); pci_add_resource_offset(&bridge->windows, hose->pre_mem_space, 0);